Well, identity is also a theme. Characters might struggle with their vampire identity and how it affects their relationships. For example, a vampire might worry about revealing their true nature to a human they love. And of course, the power dynamics within the vampire society play into the love story, as power can either attract or repel the characters involved in the love relationships.
Love and sacrifice are main themes. The love between the characters is complex and often involves sacrificing for each other or for a greater cause in the world of Vampire Knight novel.
There is Yuki Cross. She is a central character. She has a complex relationship with the vampire world and the people in it. Then there is Zero Kiryuu, who also has his own issues and a deep connection to Yuki. Kaname Kuran is another main character. He is a powerful vampire and has strong feelings for Yuki as well.
Some fanfictions focus on Hinata's role in the complex social hierarchy of the vampires. Since Vampire Knight has different vampire clans and power structures, Hinata might find herself in the middle of political intrigue. For example, she could be a key figure in uniting different clans or causing a rift depending on her actions. And of course, the theme of love triangles or complex romantic relationships involving Hinata is also very popular in these fanfictions.
One common theme is the struggle between different species. Since it involves wolves and vampires, there's often a power struggle or a need to co - exist. For example, wolves might be seen as a threat to the vampires' control in the fanfictions.
Love is a very common theme. The relationship between Zeki is often explored in depth, from the initial attraction to the deeper emotional bond. Another theme is sacrifice. They might have to sacrifice something for their love or for the greater good in the fanfictions.
One common theme is love and sacrifice. Kain often finds himself in situations where he has to choose between his love for someone and his duties or the safety of others. Another theme is the struggle between good and evil within him. Since he is a vampire, he has that dark side, but he also has a sense of morality that battles it.
In mpreg Vampire Knight fanfiction, a frequent theme is the exploration of new powers or abilities. Since it's an unusual situation in the vampire world, the pregnancy might bring out unexpected powers in the pregnant male. It could also be about the discovery of a new side of a character. For example, a tough - looking vampire who becomes pregnant might show a much softer and more nurturing side that was hidden before. This can lead to character development and new relationships forming as other characters see this new side of them.
The theme of identity is also very common. Zero has to figure out who he really is, whether he's a human, a vampire, or something in between. Additionally, redemption is a popular theme. Given Zero's actions and his inner turmoil, many fanfictions explore his journey towards redemption. There's also the theme of power, like how Zero gains or loses power and how he uses it.
Another theme is friendship. Characters in Vampire Knight Guilty fanfiction form strong bonds of friendship that help them get through difficult situations. These friendships can cross the boundaries between different species, like vampires and humans, and add a lot of depth to the stories.
One common theme is forbidden love. Since the Vampire Knight world has a strict divide between vampires and humans, many fanfictions explore the relationships that are considered taboo. For example, a vampire falling in love with a human and the challenges they face because of it.